article{e4f339e0-02cb-4b8b-b889-689f330ddff3, abstract = {Deficiency of laminin alpha2 chain leads to a severe form of congenital muscular dystrophy (MDC1A). Here, we analyzed whether the intrinsic laryngeal muscles (ILM) are spared in the dy(3K)/dy(3K) mouse model of complete laminin alpha2 chain absence. No muscle degeneration was evident; expression of various laminin chains was similar to that of limb muscles, and sustained integrin alpha7B expression was noted in laminin alpha2 chain-deficient ILM. We conclude that ILM are spared in MDC1A. Muscle Nerve 39: 91-94, 2009.}, author = {Häger, Mattias and Durbeej-Hjalt, Madeleine}, issn = {0148-639X}, language = {eng}, number = {1}, pages = {91--94}, publisher = {John Wiley & Sons}, series = {Muscle and Nerve}, title = {Intrinsic laryngeal muscles are spared from degeneration in the dy(3k)/dy(3k) mouse model of congenital muscular dystrophy type 1A.}, url = {http://dx.doi.org/10.1002/mus.21209}, volume = {39}, year = {2009 ...
The lateral cricoarytenoid muscle is a muscle in the throat that adducts and medially rotates the arytenoid cartilage. This action adducts the vocal folds, increasing the pitch of the voice and closing the rima glottidis.
Laryngeal Electromyography (LEMG) is a diagnostic test commonly used in patients with vocal fold movement disorder The aim of this study is to describe LEMG in patients with vocalfold immobility. A total of 55 dysphonic patients with vocal fold immobility diagnosed by laryngeal endoscopy were grouped according to probable clinical cause: 1) unknown; 2) traumatic; or 3) tumoral compression. They were submitted to LEMG by percutaneous insertion of concentric needle electrode. LEMG was conclusive in all patients and showed a majority with peripheral nerve injury. LEMG diagnosed peripheral nerve damage in 25 group 1, 12 group 2, and 11 group 3 patients. LEMG was normal in 4 patients, suggesting cricoarytenoid joint fixation. Central nervous system disorders was suggested in 2 and myopathic pattern in 1. As the major cause of vocal fold immobility is peripheral nerve damage, LEMG is an important test to confirm diagnosis ...
Selected References. Lyon, M.J. and R.N. Payman (2000) Comparison of the vascular innervation of the rat cochlea and vestibular system. Hearing Res. 141:189-198.. Lyon, M.J. (2000) Nonadrenergic innervation of the rat laryngeal vascular supply. Anat. Rec. 259:180-188.. Lyon, M.J. and R.C. Jensen (2001) Quantitative Analysis of Rat Inner Ear Blood Flow Using the Iodo[14C]antipyrine Technique. Hearing Res. 153:164-173.. Lyon, M.J. and J.R. Davis (2002) Age-related Blood Flow and Capillary Changes in the Rat Utricular Macula: A Quantitative Stereological and Microsphere Study. JARO 3:167-173.. Lyon, M.J. and J. Barkmeier-Kraemer (2004) Chapter 4: Vascular Supply of the Larynx; 69-108. In: Vocal Rehabilitation in Medical Speech-Language Pathology. Eds: Sapienza, C. and Casper, J. Publisher: Pro-Ed Inc, Austin TX.. Lyon, M.J., L.Steer, and L.T. Malmgren (2007) Stereological Estimates Indicate That Aging Does Not Alter the Capillary Length Density in the Human Posterior Cricoarytenoid Muscle. J Appl ...
This is because recurrent laryngeal nerve palsy will lead to paralysis of all laryngeal muscles except the cricothyroid muscle (as it is supplied by superior laryngeal nerve). The cricothyroid muscle is an adductor & therefore this will leave both the cords in median or paramedian position thus endangering proper airway, leading to stridor and dyspnoea. Trauma due to thyroidectomy is the most common causes. ...
TY - JOUR. T1 - Laryngeal adductor reflex and pharyngeal squeeze as predictors of laryngeal penetration and aspiration. AU - Aviv, Jonathan E.. AU - Spitzer, Jaclyn. AU - Cohen, Manderly. AU - Ma, Guoguang. AU - Belafsky, Peter. AU - Belafsky, Peter C. PY - 2002. Y1 - 2002. N2 - Objectives: The contribution of laryngopharyngeal (LP) sensory deficits to the outcome of swallowing and the relationship between sensory and motor deficits in the laryngopharynx is unclear. The study purpose is to determine if patients with LP sensory and motor deficits are at increased risk for laryngeal penetration and aspiration during swallowing, and to determine the relationship between pharyngeal motor weakness and LP sensory deficits. Materials and Methods: Endoscopic evaluation of swallowing with sensory testing was performed on 122 dysphagic patients who were prospectively divided into two groups. The control group was 76 patients with normal sensitivity, determined by an intact laryngeal adductor reflex (LAR) ...
definition of LAP, what does LAP mean?, meaning of LAP, Laryngeal Adductor Paralysis, LAP stands for Laryngeal Adductor Paralysis
Synonyms for cricoarytenoid arthritis in Free Thesaurus. Antonyms for cricoarytenoid arthritis. 11 words related to arthritis: inflammatory disease, atrophic arthritis, rheumatoid arthritis, rheumatism, degenerative arthritis, degenerative joint disease. What are synonyms for cricoarytenoid arthritis?
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This is a revised edition of "The Laryngeal Image During Phonation" for the non-technical audience. A short history of the laryngeal examination describes the flexible fiberoptic laryngoscope and provides a diagrammatic anatomical description of the laryngeal structures. Dr. Lawrence does a self-examination with the laryngoscope and describes the upper phayrngeal and laryngeal structures. Descriptions and laryngoscopic views of normal and abnormal male and female larynges are presented showing the changes in structure during phonation and singing.. Color and Sound (1983), approximately 25 minutes. ___________________________________________. METHODS AND CONTROLS USED IN LARYNGEAL EMG RESEARCH - Thomas Shipp, Ph.D.. Techniques are demonstrated for obtaining valid and reliable electromyographic data from relatively inaccessible intrinsic laryngeal muscles in conscious subjects. Intratracheal catheter placement is shown, and information on drug administration and physiological calibration are ...
PCA-only paresis is weakness or paralysis of the vocal cords posterior cricoarytenoid (PCA) muscle, but with normal function of the folds other muscles.
We tested the hypothesis that different strategies are used to alter tracheal pressure (Pt) during sustained and transient increases in intensity. It has been suggested that the respiratory system plays the primary role in Pt changes associated with alteration in overall intensity, whereas laryngeal adjustment is primary for transient change in Pt related to emphasis. Tracheal pressure, obtained via tracheal puncture, airflow (U), and laryngeal electromyography from the thyroarytenoid muscle (TA EMG) were collected from 6 subjects during sentence production at different intensity levels and with various stress patterns. Using a technique described in a previous study, we computed lower airway resistance (Rlaw) from measures of Pt and U obtained during a sudden change in upper airway resistance. We used this resistance value, together with direct measures of Pt and U during speech, to derive a time-varying measure of alveolar pressure (Pa), the pressure created by respiratory muscle activity and ...
Certain songbirds can contract their vocal muscles 100 times faster than humans can blink an eye - placing the birds with a handful of animals that have evolved superfast muscles, University of Utah researchers found.
Video articles in JoVE about neck muscles include In Vivo Gene Transfer to the Rabbit Common Carotid Artery Endothelium, Neck Exam, Utilizing Transcranial Magnetic Stimulation to Study the Human Neuromuscular System, A Model of Free Tissue Transfer: The Rat Epigastric Free Flap, In Vivo Evaluation of the Mechanical and Viscoelastic Properties of the Rat Tongue, Coordinate Mapping of Hyolaryngeal Mechanics in Swallowing, Non-invasive Assessment of Changes in Corticomotoneuronal Transmission in Humans, Subcutaneous Neurotrophin 4 Infusion Using Osmotic Pumps or Direct Muscular Injection Enhances Aging Rat Laryngeal Muscles, Method to Measure Tone of Axial and Proximal Muscle, Repeated Measurement of Respiratory Muscle Activity and Ventilation in Mouse Models of Neuromuscular Disease, Diagnostic Necropsy and Tissue Harvest, Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models, The Mesenteric Lymph Duct Cannulated Rat
... is an Associate Professor of Communication Disorders at Marshall University, where she focuses on the study of the voice and its disorders. Her current research focuses on laryngeal muscle biology, vocal aging, and the effects of various voice therapies on voice production. The results of her work have been published in several peer-reviewed journals in the field and presented at national and international venues for voice specialists. In addition to her personal research, Dr. Fry teaches graduate courses in Voice and Research Design and facilitates a weekly forum for undergraduate and graduate student researchers.. ...
Video articles in JoVE about neurotrophin 3 include Subcutaneous Neurotrophin 4 Infusion Using Osmotic Pumps or Direct Muscular Injection Enhances Aging Rat Laryngeal Muscles, Dissection and Culture of Chick Statoacoustic Ganglion and Spinal Cord Explants in Collagen Gels for Neurite Outgrowth Assays, Improved 3D Hydrogel Cultures of Primary Glial Cells for In Vitro Modelling of Neuroinflammation, Production and Use of Lentivirus to Selectively Transduce Primary Oligodendrocyte Precursor Cells for In Vitro Myelination Assays, Transplantation of Schwann Cells Inside PVDF-TrFE Conduits to Bridge Transected Rat Spinal Cord Stumps to Promote Axon Regeneration Across the Gap, Utilization of Microscale Silicon Cantilevers to Assess Cellular Contractile Function In Vitro, Isolation and Culture of Dissociated Sensory Neurons From Chick Embryos, Unilateral Pyramidotomy of the Corticospinal Tract in Rats for Assessment of Neuroplasticity-inducing Therapies, Lectin-based Isolation and Culture of
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Arytenoid adduction is a surgical procedure used to treat vocal cord paralysis. A suture is used to emulate the action of the lateral cricoarytenoid muscle and position the paralyzed vocal cord closer to the midline. This allows the two vocal cords to meet and can improve speaking and swallowing ability for affected patients. Arytenoid adduction is often performed in conjunction with medialization thyroplasty. One of the key functions of the larynx is phonation, the production of sound. Phonation requires the vocal cords to be adducted (positioned towards the midline) so that they can meet and vibrate together as air is expelled between them. Physiologically, the glottis is closed by intrinsic laryngeal muscles such as the lateral cricoarytenoid, thyroarytenoid, and interarytenoid muscles. These muscles act on the arytenoid cartilages at the posterior ends of the vocal cords and are innervated by the left and right recurrent laryngeal nerves. Damage to these nerves results in vocal cord ...
Objectives: The aim is; laryngeal conservative surgery indications and to help conservation surgery rates to increase, by comparing preoperative vocal fold and arytenoid movements with postoperative histopathologic examinations in carcinoma of the larynx and hypopharynx. Material and method: 30 patients with laryngeal carcinomas evaluated for preoperative vocal fold and arytenoid movements were included into our study. The movements of vocal folds and arytenoids were defined clinically as mobile, fixed or limited. Postoperatively, the laryngeal specimens were divided into subglottic, glottic and supraglottic areas and fixed with formaldehit and evaluated with a pathologist. The involvement of thyroarytenoid muscle, posterior cricoarytenoid muscle, cricoarytenoid joint, paraglottic area, conus elasticus, arytenoid cartilage were investigated. Results: In cases with limited movement of vocal fold and arytenoid movements preoperatively, the rate of thyroarytenoid muscle involvement was 33.3% (2/6), ...
Looking for online definition of cricoarytenoid in the Medical Dictionary? cricoarytenoid explanation free. What is cricoarytenoid? Meaning of cricoarytenoid medical term. What does cricoarytenoid mean?
In the present study we aimed to determine the functional properties and the myosin heavy chain (MHC) isoform composition of single chemically skinned fibres from the vocal muscle of four adult men (age: 55-67 years). Single fibres, dissected from the bioptic samples, were chemically skinned and isometric tension (P0) and maximal shortening velocity (V0) were measured at pCa 4.6. MHC and myosin light chain (MLC) composition of fibre segments and MHC distribution of the biopsy samples were analysed by SDS-poly-acrylamide gel electrophoresis (SDS-PAGE) and densitometry. Four MHC isoforms (1, 2A, 2X and a fourth isoform, provisionally called L) and five MLC isoforms (MLC1s, MLC1f, MLC3f, MLC2f, MLC2s) were identified. The major findings of this study were: (1) fast MHC isoforms (in particular MHC-2A) and fast fibres were predominant, (2) one-third of the fibres were mixed or hybrid, i.e. expressed more than one MHC isoform, (3) V0 and P0 values were determined by the MHC isoform composition and ...
The functional organization of laryngeal motoneurons in the nucleus ambiguous (NA) was evaluated in adult male rats before and after recurrent laryngeal nerve section and reinnervation. Using retrograde double labeling techniques with fluorescent probes, we obtained the number and position of labeled neurons by using the Bioquant 3-D imaging system. Reinnervation was documented by electromyography. In nine control animals vector analysis revealed significant (p less than .05) separation of the posterior cricoarytenoid (PCA) muscle motoneurons and the thyroarytenoid and lateral cricoarytenoid (TA/LCA) muscle motoneurons. The PCA motoneurons were positioned ventromedially in the NA, and TA/LCA motoneurons were found dorsolaterally in the NA. Rostral-caudal separation was not significant. Electromyography revealed phasic electrical activity synchronous with respiration in the PCA, and activity synchronous with deglutition in the TA/LCA. In four animals surviving 15 weeks following recurrent laryngeal nerve
Laryngeal muscles normally demonstrate mild activity which is usually bilateral and symmetric. Active contraction of any skeletal muscle including the laryngeal muscle, particularly during the first half-hour following FDG injection, can result in increased activity. Therefore, efforts are made to isolate the patient from conversation during and after tracer injection. However, increased activity is not uncommonly seen within the laryngeal muscles likely due to their use prior to injection and during the short conversations with the technologist at the time of injection or immediately thereafter. Asymmetric activity can be seen with recurrent laryngeal nerve palsy and vocal cord paralysis, with greater activity on the unaffected side.. ...
Many of the signs of vocal cord paralysis we appreciate today on CT and MR studies were first described with laryngography (1-3). These include atrophy of the thyroarytenoid muscle, deviation of the arytenoid muscle, enlargement of the ventricle and piriform sinus on the side of the paralysis, and a paramedian position of the involved vocal cord. As we determined, an additional CT and MR feature of vocal cord paralysis is atrophy of the PCA muscle.. Atrophy of the PCA and thyroarytenoid muscles usually occurs as a result of recurrent laryngeal or vagal nerve palsy. Muscular atrophy consequent to a nerve palsy is referred to as denervation atrophy. Denervation atrophy has been documented on CT and MR studies in skeletal muscles as well as in muscles of the head and neck innervated by various cranial nerves, including the trigeminal (V), facial (VII), vagus (X), spinal accessory (XI), and hypoglossal (XII) nerves (6-8). Imaging criteria for the diagnosis of denervation atrophy include asymmetric ...
90791 avhandlingar från svenska högskolor och universitet. Avhandling: Pharyngeal function, airway protection and anesthetic agents.
The purpose of this study is to determine the feasibility of using extrinsic laryngeal muscle stimulation to elevate the larynx in a manner similar to that which occurs during normal swallowing. This research will also determine whether laryngeal elevation will open the upper esophageal sphincter to assist with entry of the bolus into the esophagus. This protocol includes studies in normal volunteers and patients with swallowing disorders. The outcome of this study will be relevant to future use of neuromuscular stimulation for laryngeal elevation in patients with pharyngeal dysphagia.... ...
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Synonyms for Abductor muscles in Free Thesaurus. Antonyms for Abductor muscles. 4 synonyms for abductor: kidnaper, kidnapper, snatcher, abductor muscle. What are synonyms for Abductor muscles?
From: TONE-DEAFNESS Tone deafness does not refer to a problem with the ears, but to a lack of training. Tone deafness is easy to fix by training the ears and the vocal muscles. Ive taught many people that thought they were tone deaf how to match … [Read more...] ...
The purpose of this study was to investigate activity of hip adductor muscles over time and during a representative crank cycle in fatiguing pedaling. Sixteen healthy men performed incremental pedalin
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The median cricothyroid ligament is a flat band of white connective tissue that connects the front parts of the contiguous margins of the cricoid and thyroid cartilages. It is a thick and strong ligament, narrow above and broad below. Each lateral ligament is known as the conus elasticus. The lateral cricothyroid ligament is overlapped on either side by laryngeal muscles. The conus elasticus (which means elastic cone in Latin) is the lateral portion of the cricothyroid ligament. The lateral portions are thinner and lie close under the mucous membrane of the larynx; they extend from the upper border of the cricoid cartilage to the lower margin of the vocal ligaments, with which they are continuous. The vocal ligaments may therefore be regarded as the free borders of each conus elasticus, and extend from the vocal processes of the arytenoid cartilages to the angle of the thyroid cartilage about midway between its upper and lower borders. These anatomical structure have been called in many ...
article{104f1a02-6683-4458-bad2-99d4587fa569, abstract = {Intact pharyngeal function and coordination of breathing and swallowing are essential for airway protection and to avoid respiratory complications. Postoperative pulmonary complications caused by residual effects of neuromuscular-blocking agents occur more frequently in the elderly. Moreover, elderly have altered pharyngeal function which is associated with increased risk of aspiration. The purpose of this study was to evaluate effects of partial neuromuscular block on pharyngeal function, coordination of breathing and swallowing, and airway protection in individuals older than 65 yr.}, author = {Cedborg, Anna I Hårdemark and Sundman, Eva and Bodén, Katarina and Hedström, Hanne Witt and Kuylenstierna, Richard and Ekberg, Olle and Eriksson, Lars I}, issn = {1528-1175}, language = {eng}, number = {2}, pages = {312--325}, publisher = {Lippincott Williams & Wilkins}, series = {Anesthesiology}, title = {Pharyngeal Function and Breathing ...
Previous studies have shown the importance of cricothyroid muscle activation in altering fundamental frequency in the human voice. Other studies have investigated the non-linear properties of vocal fold tissue and the impact of this non-linearity on frequency response. Several physical models of the vocal folds have been made for research purposes. However, all have been isotropic in nature with linear stress-strain properties. The purpose of this study was to create a physical model with non-linear stress-strain properties to investigate the frequency response of the model as cricothyroid muscle activation was simulated (in other words, as the vocal folds were stretched in an anterior-posterior dimension). In this study the physical models of the vocal folds were stretched in 1 mm increments and the fundamental frequency (F0) was recorded at each position. Subglottal pressure was also monitored and phonation threshold pressures were recorded for each adjustment in length and vocal fold tension, because
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Issacs syndrome (also known as neuromyotonia, Isaacs-Mertens syndrome, continuous muscle fiber activity syndrome, and quantal squander syndrome) is a rare neuromuscular disorder caused by hyperexcitability and continuous firing of the peripheral nerve axons that activate muscle fibers. Symptoms, which include progressive muscle stiffness, continuously contracting or twitching muscles (myokymia), cramping, increased sweating, and delayed muscle relaxation, occur even during sleep or when individuals are under general anesthesia. Many people also develop weakened reflexes and muscle pain, but numbness is relatively uncommon. In most people with Issacs syndrome, stiffness is most prominent in limb and trunk muscles, although symptoms can be limited to cranial muscles. Speech and breathing may be affected if pharyngeal or laryngeal muscles are involved. Onset is between ages 15 and 60, with most individuals experiencing symptoms before age 40. There are hereditary and acquired (occurring from unknown
Definition of arytenoid cartilage corniculate process in the Financial Dictionary - by Free online English dictionary and encyclopedia. What is arytenoid cartilage corniculate process? Meaning of arytenoid cartilage corniculate process as a finance term. What does arytenoid cartilage corniculate process mean in finance?
The cricothyroid ligament is a median placed elastic ligament that is essentially the thickened median portion of the anterior cricothyroid membrane. It begins as a broad band attached to the upper anterior aspect of the cricoid cartilage and narrows as it ascends to attach to the lower anterior aspect of the thyroid cartilage ...
The cricothyroid ligament is a median placed elastic ligament that is essentially the thickened median portion of the anterior cricothyroid membrane. It begins as a broad band attached to the upper anterior aspect of the cricoid cartilage and narrows as it ascends to attach to the lower anterior aspect of the thyroid cartilage ...